反应详情

A stirred mixture of 3,4-difluoronitrobenzene (13.5 g, 0.85 mol), methyl 2-(4-hydroxyphenoxy)propionate (23.1 g, 0.085 mol), and potassium carbonate (12.5 g, 0.09 mol) in DMSO (200 ml) was heated in an oil bath (120° bath temperature) for one hour. After cooling the reaction mixture was poured into ice water (1000 ml) and the resulting mixture extracted with ether (3×200 ml). The ether extracts were combined, pentane (200 ml) added, and the resulting solution washed with 5% sodium hydroxide solution (200 ml), then with water. After drying (MgSO4), the solvent was evaporated to give 28 g (98%) of the desired product as a light-yellow oil which solidified upon standing. Recrystallization from hexane-ether gave an analytical sample: m.p=67.5°-69° C.; Calc: C, 57.31; H, 4.21; N, 4.18. Found: C, 57.00; H, 4.13; N, 4.11.

1. temperaturewas heated in an oil bath (120° bath temperature) for one hour
2. temperatureAfter cooling the reaction mixture
3. extractionthe resulting mixture extracted with ether (3×200 ml)
4. additionpentane (200 ml) added
5. washthe resulting solution washed with 5% sodium hydroxide solution (200 ml)
6. dry with materialAfter drying (MgSO4)
7. customthe solvent was evaporated